Cubase 11: Spectral Layer ARA drop and Drag

When I first started Cubase 11 upgrade the Spectralayer allowed me to unmix a Jamulus recored track audio with guitar and vocal tracks and then drag and drop them into my project for editing etc.
Now when I try to do this even with the original track I used at firstI get a pop up box stating,“Can’t move internal layer outside its external parent.” I have tried rebooting, restarting and used other files with the same result. Have I done something, dont know … any suggestions would be welcome.